Metal roof advice

[pyrobow]

I have an area that I would like to roof. Basically a lean-to type spaning 22 ft.
What size C-channel to span that distance on a 2-12 pitch?

[Lazyman]

6 inch will span about 20-22 feet and 8 inch should go about 25-28..If your looking for someone to weld it up let me know..

[hammer63]

the cee purlins that you attatch the roof panel to can be 6 inch but I would use 8 " and space them about 5 feet apart, from low-point of roof to high point.

your rafters (the members that carry those purlin) should be more substantial though. typically you could bolt two 8 inch cee purlins back to back to create that type member OR fabricate your rafters.

[tremman78]

id use 8", less if there is a center support pole

[TheGeneral]

We did a 25x28 and used 8"cees. The center two spanning the width was 2 8" welded back to back. Used 8" open or reciever channel purlins on the ends that the cees fit into. If in doubt call any mueller inc locations and talk to a salesman to answer any questions about load or span and material strength. Call and ask for Mario at the ballinger tx location. He can answer anything about metal buildings and carports/ lean tos

[TheGeneral]

Oh yeah. Ours had no center supports

[pyrobow]

I am tring to go without center supports if possible. There is a mueller's close I guess I wll get by to talk to them. Just wanted the green screen's opinion.

[Huntindad]

We did a 25x28 and used 8"cees. The center two spanning the width was 2 8" welded back to back. Used 8" open or reciever channel purlins on the ends that the cees fit into. If in doubt call any mueller inc locations and talk to a salesman to answer any questions about load or span and material strength. Call and ask for Mario at the ballinger tx location. He can answer anything about metal buildings and carports/ lean tos

do you have any pix of yours? that is about the same size as I am wanting to build.

bump

[Lazyman]

Here is a 20x30 that uses 8 inch for the runners and 6 inch for the cross pieces..


These are also 8 inch spanning about 26 feet..

[pyrobow]

That is along the lines I am headed. I am coming off of a CMU garage wall down to a container. How was that attached to the container? In those pics are those single 8" or Back to back

[Lazyman]

There just singles and about 5 foot apart give or take some..I welded a piece of 4 inch to the container and then a piece of angle under the 8 inch and above it..

[TheGeneral]

do you have any pix of yours? That is about the same size as i am wanting to build.

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These aren't great but what I have on my phone. This was an expansion on a 24x36 mueller building that we did at my dads house in a few weekends. Hope it helps.

[FIRETX12]

8" will span up to 25' @ no more than 60" spacing.
6" will span up to 20'. This will meet engineering guidelines. I've seen 6" span more than 20', but that is not recommended.

[HainesNYT]

I love the pic with the 2 conexes. If you have a finished one, please attach. Awesome, thanks...great info.

[Draco]

8" will span up to 25' @ no more than 60" spacing.
6" will span up to 20'. This will meet engineering guidelines. I've seen 6" span more than 20', but that is not recommended.

This is correct.